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我厂生产的球铁机座,原工艺设计类似于铸钢,采用底注,顶部放头颈大冒口(直径φ400,高320毫米)。虽然生产的机座质量符合要求,但工艺出品率低,且清除冒口困难。为此,我们改成无冒口诗造工艺,经批量生产表明,其机械性能、金相组织以及金加工后进行耐压试验,铸件合格。其工艺出品率达98.5%,避免了清除胃口的困难,节省了人工和金属材料的消耗。
I plant the ductile iron base, the original process design is similar to cast steel, with the end of the note, put the head on the top big riser (diameter φ400, height 320 mm). Although the quality of the production base to meet the requirements, but the technology is low, and clear riser difficult. To this end, we change into non-riser poetry making process, the mass production shows that its mechanical properties, microstructure and gold after the pressure test, casting qualified. The craft production rate of 98.5%, to avoid the difficulty of clearing the appetite, saving labor and consumption of metal materials.